Fifth batch for 2.6

Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/RelNotes/2.6.0.txt

@@ -56,6 +56,14 @@ UI, Workflows & Features
  * A negative !ref entry in multi-value transfer.hideRefs
    configuration can be used to say "don't hide this one".
 
+ * After "git am" without "-3" stops, running "git am -" pays attention
+   to "-3" only for the patch that caused the original invocation
+   to stop.
+
+ * When linked worktree is used, simultaneous "notes merge" instances
+   for the same ref in refs/notes/* are prevented from stomping on
+   each other.
+
 
 Performance, Internal Implementation, Development Support etc.
 
@@ -110,6 +118,13 @@ Performance, Internal Implementation, Development Support etc.
    to misuse, as the callers need to be careful to keep the number of
    active results below 4.  Their uses have been reduced.
 
+ * The "lockfile" API has been rebuilt on top of a new "tempfile" API.
+
+ * To prepare for allowing a different "ref" backend to be plugged in
+   to the system, update_ref()/delete_ref() have been taught about
+   ref-like things like MERGE_HEAD that are per-worktree (they will
+   always be written to the filesystem inside $GIT_DIR).
+
 
 Also contains various documentation updates and code clean-ups.
 
@@ -212,6 +227,23 @@ notes for details).
    in C.
    (merge 22d6857 mm/pull-upload-pack later to maint).
 
+ * When trying to see that an object does not exist, a state errno
+   leaked from our "first try to open a packfile with O_NOATIME and
+   then if it fails retry without it" logic on a system that refuses
+   O_NOATIME.  This confused us and caused us to die, saying that the
+   packfile is unreadable, when we should have just reported that the
+   object does not exist in that packfile to the caller.
+   (merge dff6f28 cb/open-noatime-clear-errno later to maint).
+
+ * The codepath to produce error messages had a hard-coded limit to
+   the size of the message, primarily to avoid memory allocation while
+   calling die().
+   (merge f4c3edc jk/long-error-messages later to maint).
+
+ * strbuf_read() used to have one extra iteration (and an unnecessary
+   strbuf_grow() of 8kB), which was eliminated.
+   (merge 3ebbd00 jh/strbuf-read-use-read-in-full later to maint).
+
  * Code cleanups and documentation updates.
    (merge 1c601af es/doc-clean-outdated-tools later to maint).
    (merge 3581304 kn/tag-doc-fix later to maint).
@@ -221,3 +253,4 @@ notes for details).
    (merge 4a6ada3 ad/bisect-cleanup later to maint).
    (merge da4c5ad ta/docfix-index-format-tech later to maint).
    (merge ae25fd3 sb/check-return-from-read-ref later to maint).
+   (merge b3325df nd/dwim-wildcards-as-pathspecs later to maint).